PHP | ReflectionClass getExtensionName() Function

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The ReflectionClass::getExtensionName() function is an inbuilt function in PHP which is used to return the name of the extension which define the class or false for user-defined classes.
Syntax:

string ReflectionClass::getExtensionName( void )

Parameters: This function does not accept any parameters.
Return Value: This function returns the name of the extension which define the class or false for user-defined classes.
Below programs illustrate the ReflectionClass::getExtensionName() function in PHP:
Program 1:

php

<?php
  
// Defining a user-defined class named as Departments
class Departments {
    static $Dept1 = 'CSE';
    private static $Dept2 = 'ECE';
    public static $Dept3 = 'EE';
}
  
// Using ReflectionClass over the class Departments
$ReflectionClass = new ReflectionClass('Departments');
  
// Calling getExtensionName() functions
$A = $ReflectionClass->getExtensionName();
  
// Getting the name of the extension
var_dump($A);
?>

Output:

bool(false)

Program 2:

php

<?php
  
// Using ReflectionClass
$ReflectionClass = new ReflectionClass('ReflectionClass');
  
// Calling getExtensionName() functions
$A = $ReflectionClass->getExtensionName();
  
// Getting the name of the extension
var_dump($A);
?>